MF135 tractormeter - clockwise or ccw?

1966 model with Perkins AD3 152 diesel.

My tractormeter still tracks hours, but I'm replacing since the glass is pitted making it nearly impossible to read and the RPM needle bounces.

When I manually turn mine with my fingers, looking at the rear of the tractormeter, clockwise seems correct. The needle follows the markings from zero on up. But looking at the front of the tractormeter while turning with fingers in the same direction, the direction would be counter clockwise. Somewhere I read that Perkins diesel takes anti (counter) clockwise.

Any ideas?
 
When looking at the face of the tractormeter with the Perkins engine the needle goes counter clock wise because it is run off the back of the camshaft.
 

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